Thin Films

Improving the illumination efficiency and color temperature for a projection system by depositing thin-film coatings on an x-cube prism

[+] Author Affiliations
Hsi-Chao Chen

De Lin Institute of Technology, Department of Electro-Optical Engineering, Taipei Country, Taiwan 236

Cheng-Chung Lee

National Central University, Thin Film Technology Center and Institute of Optical Sciences, Chung-Li, Taiwan 320

June-jei Huang

Delta Electronics, Inc., 3 Tung Yuan Road, Chungli Industrial Park, Taoyuan Hsien, Taiwan 320

Opt. Eng. 45(11), 113801 (November 27, 2006). doi:10.1117/1.2393154
History: Received November 18, 2005; Revised April 08, 2006; Accepted April 13, 2006; Published November 27, 2006
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A new x-cube prism with small polarizing dichroic filters was made for an optical projection system. The x-cube prism was used to combine the three primary colors, which were divided by the preset dichroic mirrors. A coating was designed and fabricated such that s- and p-polarized light was shifted to be obliquely incident in the x-cube prism: the shift was the same as that at the dividing dichroic mirrors. Hence, energy loss was lower than that associated with the conventional x-cube prism, and the brightness of the projection system was 33.2% higher and the color temperature was 18.2% higher than those of the conventional x-cube prism.

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© 2006 Society of Photo-Optical Instrumentation Engineers

Citation

Hsi-Chao Chen ; Cheng-Chung Lee and June-jei Huang
"Improving the illumination efficiency and color temperature for a projection system by depositing thin-film coatings on an x-cube prism", Opt. Eng. 45(11), 113801 (November 27, 2006). ; http://dx.doi.org/10.1117/1.2393154


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